Whitespace Delimited Textfile, NaN results?

5 views (last 30 days)
Sage Hayes
Sage Hayes on 28 Oct 2021
Answered: Walter Roberson on 28 Oct 2021
Hi, so I'm having trouble reading this delimited textfile. It's whitespace delimited columns with rows being indicated by carriage returns.
So far I've been trying to read it through this method:
clear all;
close all;
fid = fopen('test.txt', 'rt');
%make headers
tline = fgetl(fid);
headers = strsplit(tline, ','); %a cell array of strings
%make data
datacell = textscan(fid,'%f%f%f%f', 'Delimiter',' ', 'CollectOutput', 1);
fclose(fid);
datavalues = datacell{1}; %as a numeric array
However this has resulted in a bunch of NaN's inserted into the matrix (Capture.PNG).
Any help would be greatly appreciated.

Accepted Answer

per isakson
per isakson on 28 Oct 2021
Edited: per isakson on 28 Oct 2021
The problem is caused by 'Delimiter',' ' in
datacell = textscan(fid,'%f%f%f%f', 'Delimiter',' ', 'CollectOutput', 1);
in combination with two spaces between the third and the fourth column in the text file.
Try
datacell = textscan( fid,'%f%f%f%f', 'CollectOutput', 1);
and let Matlab take care of the problem or
datacell = textscan(fid,'%f%f%f%f', 'Delimiter',' ', 'CollectOutput',1, 'MultipleDelimsAsOne',true);

More Answers (1)

Walter Roberson
Walter Roberson on 28 Oct 2021
filename = 'https://www.mathworks.com/matlabcentral/answers/uploaded_files/781593/test.txt';
datavalues = readmatrix(filename)
datavalues = 16×4
1.0e+05 * -0.0000 0 -0.0000 4.2263 -0.0000 0 -0.0000 4.0334 -0.0000 0 -0.0000 3.9879 -0.0000 0 -0.0000 4.0397 -0.0000 0 -0.0000 4.1445 -0.0000 0 -0.0000 4.2644 -0.0000 0 -0.0000 4.3675 -0.0000 0 -0.0000 4.4280 -0.0000 0 -0.0000 4.4264 -0.0000 0 -0.0000 4.3490

Products


Release

R2021b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!